DDE Technical Specifications

 

DADiSP's DDE capability is built upon the DDEML or DDE Management Library. This support insures that DADiSP's DDE capability will be compatible with and take advantage of DDE performance enhancements in subsequent releases of MS Windows. The DDEML also enforces strict adherence to the underlying DDE message protocol.

 

  1. DADiSP supports a total of 128 unique DDE conversations. Each conversation may handle multiple DDE operations.

  2. DADiSP supports a total of 128 unique DDE advise loops (i.e. DDELINK or DDEADVISE functions).

  3. The maximum application string length is 63 characters.

  4. The maximum topic string length is 63 characters.

  5. The maximum item string length is 128 characters.

  6. The default DDE time-out value is 3000 milliseconds ( 3 seconds).